Firstly, place your ingredient. Arrow keys to change ingredients. There is an easter egg behind this to make it into a "PIZZA0430" sign! Erase by space+click ingredient.
Don't peek inside! Guess it yourself! Note: This is built using Makey Makey Extensions. Thanks to all who like this project, remix this project and just viewed this. I really like the remixes and a lot of them are taking this simple project to a way cooler level. Thanks.